Hierarchy

15Section XV — BASE METALS AND ARTICLES OF BASE METAL

7305000000Other tubes and pipes (for example, welded, riveted or similarly closed), having circular cross-sections, the external diameter of which exceeds 406,4|mm, of iron or steel

7305110000Line pipe of a kind used for oil or gas pipelines

7305110000Longitudinally submerged arc welded

7305120000Other, longitudinally welded 7305190000Other

Duties & Measures

Third Country Duty0.000 %

Base rate (erga omnes)

Applies to all third countries without preferential agreement

0.000 %

Preferential rates(35)

+25

Preferential rates - 35 Origin
Origin	Savings	Trade agreement	Details
CARIFORUM1033 0.000 %EU-CARIFORUM EPA	—	EU-CARIFORUM EPA
Eastern and Southern Africa States1034 0.000 %ESA Interim EPA	—	ESA Interim EPA
SADC EPA1035 0.000 %SADC EPA	—	SADC EPA
Preferential origin in accordance with the Agreement in the form of an Exchange of Letters between the European Union and the Kingdom of Morocco on the amendment of Protocols 1 and 4 to the Euro-Mediterranean Agreement establishing an association between the European Communities and their Member States, of the one part, and the Kingdom of Morocco, of the other part.2000 0.000 %	—	—
GSP-EBA2005 0.000 %Everything But Arms	—	Everything But Arms
European Economic Area2012 0.000 %EEA Agreement	—	EEA Agreement	1
GSP+2027 0.000 %GSP+ Enhanced Arrangement	—	GSP+ Enhanced Arrangement
Central America2200 0.000 %EU-Central America Association Agreement	—	EU-Central America Association Agreement

Additional duties(1)

ERGA OMNES

50.000 %Regulation 1457/262026-07-01

Except:NO(Norway)IS(Iceland)LI(Liechtenstein)

Carbon Border Adjustment Mechanism - CBAM(1)

inherited from 7305000000

All third countries

Regulation 0956/232026-01-01

Except:LI(Liechtenstein)IS(Iceland)NO(Norway)CH(Switzerland)XL(XL)XC(XC)

11 certificate(s) required

Y128Particular provisions

CBAM account number

Y134Particular provisions

Goods originating in Büsingen, Heligoland, or Livigno (Article 2.4 of Regulation (EU) 2023/956)

Y135Particular provisions

Goods to be moved or used in the context of military activities - Exemption by virtue Article 2.(3) of Regulation (EU) 2023/956

Y237Particular provisions

Goods of EU origin (CBAM)

Y238Particular provisions

Application to obtain the status of authorised CBAM declarant has been submitted until 31 March 2026

Y128Particular provisions

CBAM account number

Y134Particular provisions

Goods originating in Büsingen, Heligoland, or Livigno (Article 2.4 of Regulation (EU) 2023/956)

Y135Particular provisions

Goods to be moved or used in the context of military activities - Exemption by virtue Article 2.(3) of Regulation (EU) 2023/956

Y137Particular provisions

De minimis exemption - Exemption by virtue Article 2a. of Regulation (EU) 2023/956

Y237Particular provisions

Goods of EU origin (CBAM)

Y238Particular provisions

Application to obtain the status of authorised CBAM declarant has been submitted until 31 March 2026

Import/export not allowed after control

CD01023Article 2a of Regulation 2023/956: An importer, including any importer with the status of an authorised CBAM declarant, shall be exempted from the obligations under this Regulation, where the net mass of the imported goods in a given calendar year does not cumulatively exceed the single mass-based threshold laid down in point 1 of Annex VII (the “single mass-based threshold”). That threshold shall apply to the total net mass of goods under all CN codes aggregated per importer and per calendar year. In such a case, the importer, including an importer with the status of an authorised CBAM declarant, shall declare that exemption in the relevant customs declaration.

CD01024CBAM obligations do not apply to goods of EU origin, and in cases where non-CBAM goods of non-EU origin are processed together with EU-origin goods under the inward processing procedure, the resulting processed CBAM goods released for free circulation shall be excluded from CBAM obligations.

CD01025Article 17.7a. of Regulation 2023/956: By way of derogation from Article 4, where an importer or an indirect customs representative has submitted an application in accordance with Article 5 by 31 March 2026, such an importer or indirect customs representative may provisionally continue to import goods until the competent authority takes a decision under this Article.

TM967Regulation (EU) 2023/956 - Article 25: Without prejudice to Article 2a, the customs authorities shall not allow the importation of goods by any person other than an authorised CBAM declarant. This Regulation shall not apply to: - goods to be moved or used in the context of military activities pursuant to Article 1, point (49), of Commission Delegated Regulation (EU) 2015/2446, - electricity generated on the continental shelf or in the exclusive economic zone of a Member State or of a country or territory listed in points 1 and 2 of Annex III; - hydrogen originating on the continental shelf or in the exclusive economic zone of a Member State or of a country or territory listed in point 1 of Annex III.’; - an importer, where the net mass of the imported goods in a given calendar year does not cumulatively exceed the single mass-based threshold laid down in point 1 of Annex VII (the “single mass-based threshold”). Regulation (EU) 2023/956 - Article 2.4 – Scope: Regulation (EU) 2023/956 shall not apply to goods originating in the third countries and territories listed in point 1 of Annex III.

Non-preferential tariff quota(12)

ERGA OMNES

0.000 %Regulation 1457/262026-07-01

Except:LI(Liechtenstein)IL(Israel)NO(Norway)IN(India)TR(Türkiye)CN(China)IS(Iceland)

FTA partners5008

0.000 %Regulation 1457/262026-07-01

Except:IN(India)TR(Türkiye)IL(Israel)

China

0.000 %Regulation 1457/262026-07-01

Suspension -ships, vessels & drilling platforms(1)

inherited from 7305000000

ERGA OMNES

0.000 %1Regulation 2658/872016-07-01

1 certificate(s) required

C990Other certificates

End use authorisation ships and platforms (Column 8c, Annex A of Delegated Regulation (EU) 2015/2446)

Measure not applicable

EU003According to The Special Provisions of Section II (A) (3) of the Preliminary Provisions of the Combined Nomenclature the suspension of customs duties for goods for certain categories of ships, boats and other vessels and for drilling or production platforms shall be subject to conditions laid down in the relevant provisions of the European Union with a view to customs control of the use of such goods.

TM5101. Customs duties shall be suspended in respect of goods intended for incorporation in the ships, boats or other vessels classified at the following CN codes 8901 10 10; 8901 20 10; 8901 30 10; 8901 90 10; 8902 00 10; 8903 91 10; 8903 92 10; 8904 00 10; 8904 00 91; 8905 10 10; 8905 90 10; 8906 10 00; 8906 90 10 for the purposes of their construction, repair, maintenance or conversion, and in respect of goods intended for fitting to or equipping such ships, boats or other vessels. 2. Customs duties shall be suspended in respect of: (a) goods intended for incorporation in drilling or production platforms: (1) fixed, of subheading ex 8430 49, operating in or outside the territorial sea of Member States, or (2) floating or submersible, of subheading 8905 20, for the purposes of their construction, repair, maintenance or conversion, and in respect of goods intended for equipping the said platforms. (b) tubes, pipes, cables and their connection pieces, linking these drilling or production platforms to the mainland.

Import control(5)

inherited from 7305000000

All third countries

Regulation 0833/142023-12-19

Except:RU(Russia)

5 certificate(s) required

L139Import certificate/licence

Import authorisation by virtue of article 3g.7 of Council Regulation (EU) 833/2014

Y824Particular provisions

Evidence of the country of origin of the iron and steel inputs used for processing of the product in a third country

Y878Particular provisions

The product is imported from a partner country for importation of iron and steel as listed in Annex XXXVI to Regulation (EU) No 833/2014

Y859Particular provisions

Goods entered the territory of the customs union of the EU and presented to customs authorities prior to the entry into force or to applicability date of the present sanction, whichever is latest (see Article 12e of Regulation (EU) No 833/2014)

L143Import certificate/licence

Import authorisation by virtue of article 12b.2 of Council Regulation (EU) 833/2014

Import/export not allowed after control

CD864It shall be prohibited: (a) to import, directly or indirectly, iron and steel products as listed in Annex XVII into the Union if they: (i) originate in Russia; or (ii) have been exported from Russia; (b) to purchase, directly or indirectly, iron and steel products as listed in Annex XVII which are located or which originated in Russia; (c) to transport iron and steel products as listed in Annex XVII if they originated in Russia or are being exported from Russia to any other country; (d) to import or purchase, as from 30 September 2023, directly or indirectly, iron and steel products as listed in Annex XVII when processed in a third country incorporating iron and steel products originating in Russia as listed in Annex XVII; with regard to products listed in Annex XVII processed in a third country incorporating steel products originating in Russia of CN code 7207 11 or 7207 12 10 or 7224 90 , this prohibition shall apply as of 1 April 2024 for CN code 7207 11 and as of 1 October 2028 for CN codes 7207 12 10 and 7224 90, for the purposes of the application of this point, importers shall provide, at the time of importation, a proof of the country of origin of the iron and steel precursors used for the processing of the product in a third country, unless the product is imported from a partner country listed in Annex XXXVI for imports of iron and steel; (e) to provide, directly or indirectly, technical assistance, brokering services, financing or financial assistance, including financial derivatives, as well as insurance and re-insurance, related to the prohibitions in points (a), (b), (c) and (d), By way of derogation from paragraph 1, the competent authorities may authorise the purchase, import or transfer of the goods listed in Annex XVII, under such conditions as they deem appropriate, after having determined that this is necessary for the establishment, operation, maintenance, fuel supply and retreatment and safety of civil nuclear capabilities, and the continuation of design, construction and commissioning required for the completion of civil nuclear facilities such as the Paks II project, the supply of precursor material for the production of medical radioisotopes and similar medical applications, or critical technology for environmental radiation monitoring, as well as for civil nuclear cooperation, in particular in the field of research and development. Council Regulation (EU) No 833/2014 - Article 3g

North Korea

Regulation 1509/172019-07-01

1 certificate(s) required

Y971Particular provisions

Goods other than those described in the MG footnotes linked to the measure (Annex II, Part VIII of Reg. (EU) 2017/1509)

Import/export not allowed after control

CD972If the goods declared are described in the "MG" footnote linked to the measure import, purchase or transfer, directly or indirectly, the goods and technology listed in Annex II from the DPRK, whether or not originating in the DPRK shall be prohibited (Article 3.1.(c) of Regulation (EU) 2017/1509).

MG786Grade 304, 316 and austenitic stainless steel plates, valves, piping, tanks and vessels (pipes and valves greater than 8-in diameter and rated for 500 psi and tanks greater than 500 l)

MG788Vacuum valves, piping, flanges, gaskets and related equipment specially designed for use in high-vacuum service (0.1 Pa or lower pressure)

Russia

Regulation 0833/142023-12-19

3 certificate(s) required

L139Import certificate/licence

Import authorisation by virtue of article 3g.7 of Council Regulation (EU) 833/2014

L143Import certificate/licence

Import authorisation by virtue of article 12b.2 of Council Regulation (EU) 833/2014

Y859Particular provisions

Import/export not allowed after control

Ukraine

Regulation 0692/142026-06-24

EU-Ukraine DCFTA(since 2016)

3 certificate(s) required

Y997Particular provisions

Goods not originating from or destined to Crimea or Sevastopol (Articles 2 and 2b.1 of Council Regulation (EU) No 692/2014)

N864UN/EDIFACT certificate

Invoice declaration or origin declaration made out by any exporter on invoice or any other commercial document

N954UN/EDIFACT certificate

Movement certificate EUR.1

Import not allowed

CD967I. According to Council Regulation (EU) No 692/2014, it shall be prohibited to import into European Union goods originating in Crimea or Sevastopol. The prohibition shall not apply in respect of goods originating in Crimea or Sevastopol which have been made available to the Ukrainian authorities for examination, for which compliance with the conditions conferring entitlement to preferential origin has been verified and for which a certificate of origin has been issued in accordance with the Association Agreement between the European Union and its Member States, of the one part, and Ukraine, of the other part. II. According to the Council Regulation (EU) 692/2014, the export of goods and technologies suited for use in the sectors of transport; telecommunications; energy; prospection, exploration and production of oil, gas and mineral resources is prohibited: (a) to any natural or legal person, entity or body in Crimea or Sevastopol, or (b) for use in Crimea or Sevastopol.

Ukraine

Regulation 0263/222026-06-24

EU-Ukraine DCFTA(since 2016)

3 certificate(s) required

Y984Particular provisions

Goods not originating from or not destined for the non-government controlled areas of Ukraine in the oblasts of Donetsk, Kherson, Luhansk and Zaporizhzhia

N954UN/EDIFACT certificate

Movement certificate EUR.1

N864UN/EDIFACT certificate

Invoice declaration or origin declaration made out by any exporter on invoice or any other commercial document

Import/export not allowed after control

CD860According to Council Regulation (EU) 2022/263 (OJ L42I, p. 77): I. It shall be prohibited to import into the European Union goods originating in non-government controlled areas of the Donetsk, Kherson, Luhansk and Zaporizhzhia oblasts of Ukraine. The import prohibitions not apply in respect of: (a) the execution until 24 May 2022 of trade contracts concluded before 23 February 2022, or of ancillary contracts necessary for the execution of such contracts, provided that the natural or legal person, entity or body seeking to perform the contract has notified, at least 10 working days in advance, the activity or transaction to the competent authority of the Member State in which they are established; (b) goods originating in the specified territories which have been made available to the Ukrainian authorities for examination, for which compliance with the conditions conferring entitlement to preferential origin has been verified and for which a certificate of origin has been issued in accordance with the EU-Ukraine Association Agreement. II. It shall be prohibited to sell, supply, transfer or export goods and technology listed in Annex II to Council Regulation (EU) 2022/263: (a) to any natural or legal person, entity or body in the specified territories, or (b) for use in the specified territories. Annex II shall include certain goods and technologies suited for use in the following key sectors: (i) transport; (ii) telecommunications; (iii) energy; (iv) the prospecting, exploration and production of oil, gas and mineral resources. The prohibitions in point II above shall be without prejudice to the execution until 24 August 2022 of an obligation arising from a contract concluded before 23 February 2022, or from ancillary contracts necessary for the execution of such contracts, provided that the competent authority has been informed at least five working days in advance.

Import prohibition(1)

inherited from 7300000000

Belarus

—Regulation 0355/222022-06-05

TM954It shall be prohibited: to import, directly or indirectly, iron and steel products as listed in Annex XII into the Union if they: (i) originate in Belarus; or (ii) have been exported from Belarus; COUNCIL REGULATION (EC) No 765/2006 - Article 1q.1 (COUNCIL REGULATION (EU) 2022/355)

Restriction on entry into free circulation(1)

inherited from 7305000000

North Korea

Regulation 1509/172019-07-01

1 certificate(s) required

Y970Particular provisions

Goods other than those described in the MG footnotes linked to the measure (Annex II, Part VI of Reg. (EU) 2017/1509)

Import/export not allowed after control

MG804Maraging steel capable of an ultimate tensile strength of 1,950 MPa or more at 293 K (20°C) and in any of the following forms: (a) Sheet, plate or tubing with a wall or plate thickness equal to or less than 5.0 mm; (b) Tubular forms with a wall thickness of 50 mm or less and having an inner diameter of 270 mm or more

Start date: 1972-01-01

Description & Classification

Common misclassifications

7305120000: longitudinally welded, but not submerged arc welded
7305190000: other pipes within the same heading not specified as longitudinally submerged arc welded

Classification tips

longitudinally submerged arc welded
pipes expressly described as longitudinally submerged arc welded

Sample products

Steel line pipe for oil or gas pipelines, circular cross-section, external diameter exceeding 406,4 mm, longitudinally submerged arc welded

Regulatory notes

NENC7305

Other tubes and pipes (for example, welded, riveted or similarly closed), having circular cross-sections, the external diameter of which exceeds 406,4 mm, of iron or steel The explanatory note to heading 7304 applies, mutatis mutandis.

Chapter noteChapter 73 — Articles of iron or steel

This chapter covers articles of iron or steel, including cast iron, but excludes products specifically covered in Chapters 72 (iron and steel in primary and semi-finished forms) or in Section XVI (machinery and mechanical appliances). Articles of iron or steel which are clearly identifiable as parts of specific machines or apparatus are classified with those machines in Chapters 84-85 rather than in this chapter. The chapter includes a wide range of manufactured products such as tubes, pipes, structures, containers, wire products, chains, screws, bolts, needles, springs, stoves, radiators, and other articles for domestic, industrial or construction use.

Non-preferential origin

specific

Other tubes and pipes >406.4mm diameter

CTH

Annex 22-01 DA 2015/2446

FAQ

What is the EU customs duty for Longitudinally submerged arc welded (7305110000)?

The third country duty (erga omnes) for Longitudinally submerged arc welded is 0.000 %. This rate applies to imports from countries without a preferential trade agreement with the EU.

Are there tariff preferences for Longitudinally submerged arc welded (7305110000)?

Yes, 34 tariff preferences are available for this code. Preferential rates apply to imports from countries with a trade agreement with the EU.

Are import controls required for Longitudinally submerged arc welded (7305110000)?

Yes, 5 import control measure(s) apply to this code (e.g. CITES, REACH, sanitary controls, etc.).

How many BTIs (Binding Tariff Information) exist for Longitudinally submerged arc welded (7305110000)?

2 BTIs have been issued for this TARIC code by EU Member States customs authorities.

What products are classified under code 7305110000?

Help

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Ask a question about this code or find a tariff classification expert.

Hierarchy

15Section XV — BASE METALS AND ARTICLES OF BASE METAL

7300000000ARTICLES OF IRON OR STEEL

7305000000Other tubes and pipes (for example, welded, riveted or similarly closed), having circular cross-sections, the external diameter of which exceeds 406,4|mm, of iron or steel

7305110000Line pipe of a kind used for oil or gas pipelines

7305110000Longitudinally submerged arc welded

7305120000Other, longitudinally welded 7305190000Other

Duties & Measures

Third Country Duty0.000 %

Base rate (erga omnes)

Applies to all third countries without preferential agreement

0.000 %

Preferential rates(35)

+25

Preferential rates - 35 Origin
Origin	Savings	Trade agreement	Details
CARIFORUM1033 0.000 %EU-CARIFORUM EPA	—	EU-CARIFORUM EPA
Eastern and Southern Africa States1034 0.000 %ESA Interim EPA	—	ESA Interim EPA
SADC EPA1035 0.000 %SADC EPA	—	SADC EPA
Preferential origin in accordance with the Agreement in the form of an Exchange of Letters between the European Union and the Kingdom of Morocco on the amendment of Protocols 1 and 4 to the Euro-Mediterranean Agreement establishing an association between the European Communities and their Member States, of the one part, and the Kingdom of Morocco, of the other part.2000 0.000 %	—	—
GSP-EBA2005 0.000 %Everything But Arms	—	Everything But Arms
European Economic Area2012 0.000 %EEA Agreement	—	EEA Agreement	1
GSP+2027 0.000 %GSP+ Enhanced Arrangement	—	GSP+ Enhanced Arrangement
Central America2200 0.000 %EU-Central America Association Agreement	—	EU-Central America Association Agreement

Additional duties(1)

ERGA OMNES

50.000 %Regulation 1457/262026-07-01

Except:NO(Norway)IS(Iceland)LI(Liechtenstein)

Carbon Border Adjustment Mechanism - CBAM(1)

inherited from 7305000000

All third countries

Regulation 0956/232026-01-01

Except:LI(Liechtenstein)IS(Iceland)NO(Norway)CH(Switzerland)XL(XL)XC(XC)

11 certificate(s) required

Y128Particular provisions

CBAM account number

Y134Particular provisions

Goods originating in Büsingen, Heligoland, or Livigno (Article 2.4 of Regulation (EU) 2023/956)

Y135Particular provisions

Goods to be moved or used in the context of military activities - Exemption by virtue Article 2.(3) of Regulation (EU) 2023/956

Y237Particular provisions

Goods of EU origin (CBAM)

Y238Particular provisions

Application to obtain the status of authorised CBAM declarant has been submitted until 31 March 2026

Y128Particular provisions

CBAM account number

Y134Particular provisions

Goods originating in Büsingen, Heligoland, or Livigno (Article 2.4 of Regulation (EU) 2023/956)

Y135Particular provisions

Goods to be moved or used in the context of military activities - Exemption by virtue Article 2.(3) of Regulation (EU) 2023/956

Y137Particular provisions

De minimis exemption - Exemption by virtue Article 2a. of Regulation (EU) 2023/956

Y237Particular provisions

Goods of EU origin (CBAM)

Y238Particular provisions

Application to obtain the status of authorised CBAM declarant has been submitted until 31 March 2026

Import/export not allowed after control

Non-preferential tariff quota(12)

ERGA OMNES

0.000 %Regulation 1457/262026-07-01

Except:LI(Liechtenstein)IL(Israel)NO(Norway)IN(India)TR(Türkiye)CN(China)IS(Iceland)

FTA partners5008

0.000 %Regulation 1457/262026-07-01

Except:IN(India)TR(Türkiye)IL(Israel)

China

0.000 %Regulation 1457/262026-07-01

Suspension -ships, vessels & drilling platforms(1)

inherited from 7305000000

ERGA OMNES

0.000 %1Regulation 2658/872016-07-01

1 certificate(s) required

C990Other certificates

End use authorisation ships and platforms (Column 8c, Annex A of Delegated Regulation (EU) 2015/2446)

Measure not applicable

Import control(5)

inherited from 7305000000

All third countries

Regulation 0833/142023-12-19

Except:RU(Russia)

5 certificate(s) required

L139Import certificate/licence

Import authorisation by virtue of article 3g.7 of Council Regulation (EU) 833/2014

Y824Particular provisions

Evidence of the country of origin of the iron and steel inputs used for processing of the product in a third country

Y878Particular provisions

The product is imported from a partner country for importation of iron and steel as listed in Annex XXXVI to Regulation (EU) No 833/2014

Y859Particular provisions

L143Import certificate/licence

Import authorisation by virtue of article 12b.2 of Council Regulation (EU) 833/2014

Import/export not allowed after control

North Korea

Regulation 1509/172019-07-01

1 certificate(s) required

Y971Particular provisions

Goods other than those described in the MG footnotes linked to the measure (Annex II, Part VIII of Reg. (EU) 2017/1509)

Import/export not allowed after control

MG786Grade 304, 316 and austenitic stainless steel plates, valves, piping, tanks and vessels (pipes and valves greater than 8-in diameter and rated for 500 psi and tanks greater than 500 l)

MG788Vacuum valves, piping, flanges, gaskets and related equipment specially designed for use in high-vacuum service (0.1 Pa or lower pressure)

Russia

Regulation 0833/142023-12-19

3 certificate(s) required

L139Import certificate/licence

Import authorisation by virtue of article 3g.7 of Council Regulation (EU) 833/2014

L143Import certificate/licence

Import authorisation by virtue of article 12b.2 of Council Regulation (EU) 833/2014

Y859Particular provisions

Import/export not allowed after control

Ukraine

Regulation 0692/142026-06-24

EU-Ukraine DCFTA(since 2016)

3 certificate(s) required

Y997Particular provisions

Goods not originating from or destined to Crimea or Sevastopol (Articles 2 and 2b.1 of Council Regulation (EU) No 692/2014)

N864UN/EDIFACT certificate

Invoice declaration or origin declaration made out by any exporter on invoice or any other commercial document

N954UN/EDIFACT certificate

Movement certificate EUR.1

Import not allowed

Ukraine

Regulation 0263/222026-06-24

EU-Ukraine DCFTA(since 2016)

3 certificate(s) required

Y984Particular provisions

Goods not originating from or not destined for the non-government controlled areas of Ukraine in the oblasts of Donetsk, Kherson, Luhansk and Zaporizhzhia

N954UN/EDIFACT certificate

Movement certificate EUR.1

N864UN/EDIFACT certificate

Invoice declaration or origin declaration made out by any exporter on invoice or any other commercial document

Import/export not allowed after control

Import prohibition(1)

inherited from 7300000000

Belarus

—Regulation 0355/222022-06-05

Restriction on entry into free circulation(1)

inherited from 7305000000

North Korea

Regulation 1509/172019-07-01

1 certificate(s) required

Y970Particular provisions

Goods other than those described in the MG footnotes linked to the measure (Annex II, Part VI of Reg. (EU) 2017/1509)

Import/export not allowed after control

Start date: 1972-01-01

Trade Statistics

Description & Classification

Common misclassifications

7305120000: longitudinally welded, but not submerged arc welded
7305190000: other pipes within the same heading not specified as longitudinally submerged arc welded

Classification tips

longitudinally submerged arc welded
pipes expressly described as longitudinally submerged arc welded

Sample products

Steel line pipe for oil or gas pipelines, circular cross-section, external diameter exceeding 406,4 mm, longitudinally submerged arc welded

Associated BTIs